Contributions from Inter-grain Boundaries to the Magneto-resistive Effect in Polycrystalline High-T Superconductors. The Underlying Reason of Different Behavior for YBCO and BSCCO Systems

D. A. Balaev, S. I. Popkov, S. V. Semenov, A. A. Bykov, E. I. Sabitova, A. A. Dubrovskiy, K. A. Shaykhutdinov, M. I. Petrov

Результат исследований: Научные публикации в периодических изданияхстатья

5 Цитирования (Scopus)

Аннотация

In order to clarify the mechanisms in charge of broadening of resistive transition R(T ) in magnetic fields of bismuth-based polycrystalline high-TC superconductor (HTSC), a comparative study of Bi1.8Pb0.3Sr1.9Ca2Cu3Ox (BSCCO) and YBa2Cu3O7−δ(YBCO) have been performed. Magnetoresistive effects and irreversibility line obtained from magnetic measurements have been studied. It was es- tablished that (1) for YBCO, the smooth part of R(T ) de- pendence unambiguously corresponds to dissipation in the intergrain boundaries for arbitrary magnetic fields; (2) for polycrystalline BSCCO, the smooth part of R(T ) depen- dences correspond to dissipation within intergrain boundary subsystem in the field range H102 Oe reflect the dissipation processes occur- ring both in intergrain boundary and HTSC grain subsys- tems; (3) for the high-field range, the contribution from in- tergrain boundaries of BSCCO can be distinguished from magne
Язык оригиналаанглийский
Страницы (с-по)2129-2136
ЖурналJournal of Superconductivity and Novel Magnetism
Том24
Номер выпуска7
DOI
СостояниеОпубликовано - 2011
Опубликовано для внешнего пользованияДа

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